GriGri3D Stereogram vs PowerTread
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
GriGri3D Stereogram
Explore hidden 3D objects within stereograms using intuitive touch controls for rotation and scaling. This app also offers a parallel view method to help relax tired eyes. Customize view methods, depth, and patterns in real-time with a collection of beautiful patterns and 3D models.
- Interactive 3D object viewing
- One-finger rotation
- Pinch-to-scale functionality
- Parallel view for eye relaxation
- Real-time customization of view settings
- Collection of 30+ patterns and 3D models
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Have you ever want to touch the hidden objects when you view stereogram? This app grant the wish just a little bit. Rotation with one finger, scaling with pinch. It moves like touching with your finger. View it with the rotation and size you like. .:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:. Also to relax tired eyes. The Parallel view method helps relieve the muscles of the eyes. .:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:. Adjust parallel/cross view method, depth, background pattern, and distance of dots in realtime .:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:. 30+2 Carefully selected beautiful patterns and 3D models .:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:. This is a app to view 3D images called the single-image stereogram, autostereogram or magic eye. You can see the stereoscopic images with the naked eye without using special goggles or glasses. See the screen with a gaze like looking far ( Parallel View Method ) or with crossed eyes ( Cross View Method ). The way to view is explained in detail in the app. .:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:. It moves smoothly with 60* images per second. * iPhone 5, iPad 4th or later .:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:. Youtube: https://youtu.be/ciIHGPj48g4 .:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:. "GriGri" means to turn and turn it in various directions in Japanese. Let's GriGri! .:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:..:.:.:. - Striving for the most beautiful single image stereogram - 2017 Masataka Hakozaki
PowerTread
Simulate real-world terrain and power-based running on your treadmill. This app offers structured workouts, automatic incline control, and performance tracking to prepare you for races. Sync your data with Apple Health for comprehensive training insights.
- GPX course simulation
- Automatic incline control
- Power-based running metrics
- Structured interval workouts
- Apple Health integration
- FTMS-compatible treadmill support
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PowerTread — Real-world treadmill training for serious runners. Turn indoor running into terrain-based, power-driven race preparation. PowerTread enhances your treadmill workouts with GPX course simulation, structured interval support, automatic incline control, and integrated power tracking. Prepare for real races while training indoors. Real-World Treadmill Simulation • Load GPX routes and simulate real outdoor courses • Experience climbs and descents automatically on FTMS-compatible treadmills • Match pacing and effort to real terrain Power-Based Running Indoors • Automatic incline-adjusted running power • Train by effort, not just speed • Track performance for focused race preparation Structured Workouts + Course Execution • Run intervals and structured workouts during terrain simulation • Combine course profiles with workout targets • Stay focused on effort and pacing Sync & Health Integration • Import and organize workouts and routes • Export completed runs to supported training platforms • Save workout data and performance metrics to Apple Health Smart Compatibility • Works with FTMS-compatible treadmills • Supports Bluetooth performance sensors • Automates incline while keeping you in control Built for Focused Training PowerTread is a treadmill training app built for runners who want indoor sessions to reflect real-world effort. Whether preparing for a race, improving running power, or staying consistent between outdoor runs, PowerTread helps you train with purpose. Free + Pro Features Free • Sample courses • Sample workouts • Passive mode — records incline and adjusts running power while you control the treadmill PowerTread Pro (one-time unlock) • Import unlimited GPX routes • Retrieve scheduled workouts • Retrieve saved routes • Expanded course and workout library No subscriptions. No recurring fees.
Screenshots
Verdict
The clearest difference is price: PowerTread at Free against GriGri3D Stereogram's $2.99. PowerTread also leads on rating (5.0 vs 4.5) and review sentiment (100% vs 87%). GriGri3D Stereogram's advantage is in-app purchases (none vs 1) and ratings volume (12 vs 2). On ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
PowerTread is free to download; GriGri3D Stereogram costs $2.99 up front. PowerTread sells 1 one-off in-app purchase. GriGri3D Stereogram asks for nothing beyond the download.
PowerTread holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: GriGri3D Stereogram has 12 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 87% of GriGri3D Stereogram's written reviews are positive against 100% of PowerTread's.
| Parameter | GriGri3D Stereogram | PowerTread |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 4.5 (12 ratings) | 5.0 (2 ratings) — better |
| Positive reviews | 86.7% of reviews | 100.0% of reviews — better |
| Number of ratings | 12 — better | 2 |
| Update frequency | — | Every 3 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.1 — better | 18.6 |
| Further details — not scored | ||
| Size | 62 MB | 45 MB |
| Age rating | 4+ | 4+ |
| Developer | Masataka Hakozaki | NoVa Solutions Group, LLC |
Customer experience
GriGri3D Stereogram
PowerTread
In-app purchases
GriGri3D Stereogram
No in-app purchases
PowerTread
- PowerTread Pro$24.99
Questions
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